AT commands support

White Paper T610/612

GPRS enables constant connection and high speed

With GPRS, the connection is maintained “constantly”, and data is transmitted in packets. Pricing of GPRS can be dependent on the actual use of bandwidth, which

means very low cost when no data is sent or received, while the phone remains connected. When transmitting large amounts of data, bandwidth can be increased automatically to allow faster transmission speed, up to 85,600 bps download speed.

This section outlines the AT commands supported by the T610/612. The information here can be of use for advanced users, to indicate the possibilities they have to:

•develop new communications software

•add the T610/ 612 to an application’s list of compati- ble modems

•adjust the settings of their mobile telephone and modem

The modem in the T610/612 supports the V.25ter command set, which is the standard communication set used by modems.

The T610/612 is compatible with industry de facto extensions, ETSI 07.05, 07.07 and 07.10.

Overview of AT command functions

AT commands are used to configure the mobile telephone, to request information about the current configuration or operational status of the mobile phone, and to test availability and request the range of valid parameters, when applicable, for an AT command.

The built-in modem can be set to any one of three modes of operation. These are:

Off-line command mode

The command mode for entry of AT commands, when the device is first turned on.

On-line data mode

Allows “normal” operation of the built-in modem, for exchanging data or facsimiles with a remote modem.

On-line command mode

For sending AT commands to the built-in modem while

remaining connected to a remote modem.

The AT commands are grouped as follows:

•Control and Identification

•Call Control

•Interface Commands

•Data Compression

•Mode Management

•Audio Control

•Accessory Menus

•Accessory Authentication

•Voice Call Control

•Accessory Identification

•GSM DTE-DCE Interface Commands

•GSM Call Control

•GSM Data

•GSM High Speed Circuit Switched Data

•GSM Network Services

•GSM USSD

•GSM Facility Lock

•GSM Mobile Equipment, Control and Status

•GSM Mobile Equipment Error Control

•GSM SMS and PDU Mode

•GSM GPRS

•GSM Phonebook

•GSM Clock, Date and Alarm Handling

•GSM Subscriber Identification

•Ericsson Specific AT Commands for GSM

•MMI Settings

•Voice Control

•OBEX

•WAP Browser